test: add test for bus::match

Change-Id: Ia45c659a6d88e8a688bcdc92a084a8edc7455ba8
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>

2 files changed, 55 insertions, 0 deletions

diff --git a/test/Makefile.am b/test/Makefile.am
index 0e66587..fb1895c 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -10,6 +10,10 @@ check_PROGRAMS += bus_list_names
 bus_list_names_SOURCES = bus/list_names.cpp
 bus_list_names_LDFLAGS = $(gtest_ldflags) $(SYSTEMD_LIBS)
 
+check_PROGRAMS += bus_match
+bus_match_SOURCES = bus/match.cpp
+bus_match_LDFLAGS = $(gtest_ldflags) $(SYSTEMD_LIBS)
+
 check_PROGRAMS += message_append
 message_append_CXXFLAGS = $(SYSTEMD_CFLAGS) $(PTHREAD_CFLAGS)
 message_append_LDFLAGS = $(SYSTEMD_LIBS) $(PTHREAD_LIBS)
diff --git a/test/bus/match.cpp b/test/bus/match.cpp
new file mode 100644
index 0000000..8b58c9f
--- /dev/null
+++ b/test/bus/match.cpp
@@ -0,0 +1,51 @@
+#include <gtest/gtest.h>
+#include <sdbusplus/bus.hpp>
+#include <sdbusplus/bus/match.hpp>
+
+class Match : public ::testing::Test
+{
+    protected:
+        decltype(sdbusplus::bus::new_default()) bus =
+                sdbusplus::bus::new_default();
+
+        static constexpr auto busName =
+                "xyz.openbmc_project.sdbusplus.test.Match";
+
+        static constexpr auto matchRule =
+                "type='signal',"
+                "interface=org.freedesktop.DBus,"
+                "member='NameOwnerChanged',"
+                "arg0='xyz.openbmc_project.sdbusplus.test.Match'";
+
+        void waitForIt(bool& triggered)
+        {
+            for (size_t i = 0; (i < 16) && !triggered; ++i)
+            {
+                bus.wait(0);
+                bus.process_discard();
+            }
+        }
+};
+
+TEST_F(Match, FunctorIs_sd_bus_message_handler_t)
+{
+    using namespace std::literals;
+
+    bool triggered = false;
+    auto trigger = [](sd_bus_message *m, void* context, sd_bus_error* e)
+        {
+            *static_cast<bool*>(context) = true;
+            return 0;
+        };
+
+    sdbusplus::bus::match_t m{bus, matchRule, trigger, &triggered};
+    auto m2 = std::move(m);  // ensure match is move-safe.
+
+    waitForIt(triggered);
+    ASSERT_FALSE(triggered);
+
+    bus.request_name(busName);
+
+    waitForIt(triggered);
+    ASSERT_TRUE(triggered);
+}